Gustave talking to Zero who is off screen, but he leans into range of the mirror. All the while, the subject of the conversation is dead center of the shot (the painting).

Excellent POV. Talking to each other, but the audience gets to feel like they are part of the conversation because the actors are looking directly into the lens.

Wes Anderson isn’t afraid of getting the subject of the shot dead center if necessary. I’ve noticed many directors/cinematographers don’t do this. He also isn’t afraid to tell his actors to look directly into the camera when the camera is meant to be a person.